Bonus pack: Treasure maps

Does anyone have detailed info regarding the bonus pack: treasure maps ?

Do we get each map for each zone?

Thanks

From what I saw in the beta - you get a set of maps - one for each alliance area - but in no way is it every treasure map that exists.  There are 4-5 maps for each zone and we get no where near that amount.

Do you get one set per character or is this one per area per account?

It was one set per account - at least in the beta.

Yep, is one treasure map zone for every zone in Tamriel, divided by Alliance.
These we get with the 'Explorer Pack' have really good loot when you find it (and you will find the chest only after you dig the terrain, and you don't need to lockpicking it); The first I get - the one on Bleakrock Isle - give me two green pieces of armor (very good for my level of gear -5-) and two blue weapon with elemental damage enchanted on it, a fire dagger and a shock mace.

Instead, chests you get when you follow Treasure Maps X are differents in loot. Less rich than the one we get with the pre-order. 

Are the treasure maps linked to the level of the toon opening the chest or are they pre-defined levels?

I don't know this, sadly.
When I discover it, I was 5 and it give me all equip of level 5. Maybe they are linked to your char, don't know really ;(